Black Box LGS103AE, LGS104AE Installation Manual

24 or 48 Port 10/100/1000B-T Layer III Ethernet

Switches with 10Gbps Uplinks.

uppor In orma ion:

www.blackbox.eu

u mer

10Gbps Switch L3

I

NS TALLATION

G

UIDE

LGS103AE GIGABIT ETHERNET SWITCH

Layer 3 Stackable Gigabit Ethernet Switch
with 20 10/100/1000BASE-T (RJ-45) Ports,
4 Gigabit Combination Ports (RJ-45/SFP),
2 10-Gigabit Extender Module Slots,
and 2 Stacking Ports

LGS104AE GIGABIT ETHERNET SWITCH

Layer 3 Stackable Gigabit Ethernet Switch
with 44 10/100/1000BASE-T (RJ-45) Ports,
4 Gigabit Combination Ports (RJ-45/SFP),
2 10-Gigabit Extender Module Slots,
and 2 Stacking Ports

LGS103AE
LGS104AE

– 5 –

COMPLIANCES AND S

AFETY

S

TATEMENTS

FCC - CLASS A

This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment
is operated in a commercial environment. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and used in accordance
with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be required to correct the
interference at his own expense.

You are cautioned that changes or modifications not expressly approved by the
party responsible for compliance could void your authority to operate the
equipment.

You may use unshielded twisted-pair (UTP) for RJ-45 connections - Category 3
or better for 10 Mbps connections, Category 5 or better for 100 Mbps
connections, Category 5, 5e, or 6 for 1000 Mbps connections. For fiber optic
connections, you may use 50/125 or 62.5/125 micron multimode fiber or 9/125
micron single-mode fiber.

INDUSTRY CANADA - CLASS A

This digital apparatus does not exceed the Class A limits for radio noise
emissions from digital apparatus as set out in the interference-causing
equipment standard entitled “Digital Apparatus,” ICES-003 of the Department of
Communications.

Cet appareil numérique respecte les limites de bruits

radioélectriques

applicables
aux appareils numériques de Classe A prescrites dans la norme sur le matériel
brouilleur: “Appareils Numériques,” NMB-003 édictée par le ministère des
Communications.

JAPAN VCCI CLASS A

– 6 –

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OMPLIANCES AND SAFETY STATEMENTS

CE MARK DECLARATION OF CONFORMANCE FOR EMI AND SAFETY (EEC)

This information technology equipment complies with the requirements of the
Council Directive 89/336/EEC on the Approximation of the laws of the Member
States relating to Electromagnetic Compatibility and 73/23/EEC for electrical
equipment used within certain voltage limits and the Amendment Directive 93/
68/EEC. For the evaluation of the compliance with these Directives, the following
standards were applied:

RFI Emission:

◆

Limit class A according to EN 55022

◆

Limit class A for harmonic current emission according to EN 61000-3-

2

◆

Limitation of voltage fluctuation and flicker in low-voltage supply

system according to EN 61000-3-3

Immunity:

◆

Product family standard according to EN 55024

◆

Electrostatic Discharge according to EN 61000-4-2

◆

Radio-frequency electromagnetic field according to EN 61000-4-3

◆

Electrical fast transient/burst according to EN 61000-4-4

◆

Surge immunity test according to EN 61000-4-5

◆

Immunity to conducted disturbances, Induced by radio-frequency

fields: EN 61000-4-6

◆

Power frequency magnetic field immunity test according to EN 61000-

4-8

◆

Voltage dips, short interruptions and voltage variations immunity test

according to EN 61000-4-11

LVD:

◆

EN 60950-1:2001

– 7 –

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OMPLIANCES AND SAFETY STATEMENTS

SAFETY COMPLIANCE

Warning: Fiber Optic Port Safety

CLASS I

LASER DEVICE

When using a fiber optic port, never look at the transmit laser while it
is powered on. Also, never look directly at the fiber TX port and fiber
cable ends when they are powered on.

Avertissment: Ports pour fibres optiques - sécurité sur le plan optique

DISPOSITIF

LASER

DE CLASSE I

Ne regardez jamais le laser tant qu'il est sous tension. Ne regardez
jamais directement le port TX (Transmission) à fibres optiques et les
embouts de câbles à fibres optiques tant qu'ils sont sous tension.

Warnhinweis: Faseroptikanschlüsse - Optische Sicherheit

LASERGER

ÄT

DER KLASSE I

Niemals ein Übertragungslaser betrachten, während dieses
eingeschaltet ist. Niemals direkt auf den Faser-TX-Anschluß und auf
die Faserkabelenden schauen, während diese eingeschaltet sind.

PSE ALARM 本製品に同梱いたしております電源コード

セットは、 本製品専用です。本電源コードセットは、本
製品以外の 製品並びに他の用途でご使用いただくことは
出来ません。 製品本体に同梱された電源コードセットを
利用し、他製品 の電源コードセットを使用しないで下さ
い。

– 8 –

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OMPLIANCES AND SAFETY STATEMENTS

POWER CORD SAFETY

Please read the following safety information carefully before installing
the switch:

WARNING:

Installation and removal of the unit must be carried out by qualified

personnel only.

◆

The unit must be connected to an earthed (grounded) outlet to comply with

international safety standards.

◆

Do not connect the unit to an A.C. outlet (power supply) without an earth

(ground) connection.

◆

The appliance coupler (the connector to the unit and not the wall plug) must

have a configuration for mating with an EN 60320/IEC 320 appliance inlet.

◆

The socket outlet must be near to the unit and easily accessible. You can

only remove power from the unit by disconnecting the power cord from the
outlet.

◆

This unit operates under SELV (Safety Extra Low Voltage) conditions

according to IEC 60950. The conditions are only maintained if the
equipment to which it is connected also operates under SELV conditions.

France and Peru only
This unit cannot be powered from IT† supplies. If your supplies are of IT type,
this unit must be powered by 230 V (2P+T) via an isolation transformer ratio
1:1, with the secondary connection point labelled Neutral, connected directly to
earth (ground).

†

Impédance à la terre

I

MPORTANT

!

Before making connections, make sure you have the correct cord

set. Check it (read the label on the cable) against the following:

– 9 –

C

OMPLIANCES AND SAFETY STATEMENTS

Power Cord Set

U.S.A. and Canada The cord set must be UL-approved and CSA certified.

The minimum specifications for the flexible cord are:

- No. 18 AWG - not longer than 2 meters, or 16 AWG.

- Type SV or SJ

- 3-conductor

The cord set must have a rated current capacity of at least 10 A

The attachment plug must be an earth-grounding type with NEMA
5-15P (15 A, 125 V) configuration.

Denmark The supply plug must comply with Section 107-2-D1, Standard

DK2-1a or DK2-5a.

Switzerland The supply plug must comply with SEV/ASE 1011.

U.K. The supply plug must comply with BS1363 (3-pin 13 A) and be fitted

with a 5 A fuse which complies with BS1362.

The mains cord must be <HAR> or

<BASEC>

marked and be of type

HO3VVF3GO.75 (minimum).

Europe The supply plug must comply with CEE7/7 (“SCHUKO”).

The mains cord must be <HAR> or

<BASEC>

marked and be of type

HO3VVF3GO.75 (minimum).

IEC-320 receptacle.

Veuillez lire à fond l'information de la sécurité suivante avant d'installer
le Switch:

AVERTISSEMENT:

L’installation et la dépose de ce groupe doivent être confiés à

un personnel qualifié.

◆

Ne branchez pas votre appareil sur une prise secteur (alimentation

électrique) lorsqu'il n'y a pas de connexion de mise à la terre (mise à la
masse).

◆

Vous devez raccorder ce groupe à une sortie mise à la terre (mise à la

masse) afin de respecter les normes internationales de sécurité.

◆

Le coupleur d’appareil (le connecteur du groupe et non pas la prise murale)

doit respecter une configuration qui permet un branchement sur une entrée
d’appareil EN 60320/IEC 320.

– 10 –

C

OMPLIANCES AND SAFETY STATEMENTS

◆

La prise secteur doit se trouver à proximité de l’appareil et son accès doit

être facile. Vous ne pouvez mettre l’appareil hors circuit qu’en débranchant
son cordon électrique au niveau de cette prise.

◆

L’appareil fonctionne à une tension extrêmement basse de sécurité qui est

conforme à la norme IEC 60950. Ces conditions ne sont maintenues que si
l’équipement auquel il est raccordé fonctionne dans les mêmes conditions.

France et Pérou uniquement:
Ce groupe ne peut pas être alimenté par un dispositif à impédance à la terre. Si
vos alimentations sont du type impédance à la terre, ce groupe doit être
alimenté par une tension de 230 V (2 P+T) par le biais d’un transformateur
d’isolement à rapport 1:1, avec un point secondaire de connexion portant
l’appellation Neutre et avec raccordement direct à la terre (masse).

Cordon électrique - Il doit être agréé dans le pays

d’utilisation

Etats-Unis et Canada: Le cordon doit avoir reçu

l’homologation

des UL et un certificat de

la CSA.

Les spécifications minimales pour un cable flexible sont AWG No.
18, ouAWG No. 16 pour un cable de longueur inférieure à 2
mètres.

- type SV ou SJ

- 3 conducteurs

Le cordon doit être en mesure d’acheminer un courant nominal
d’au moins 10 A.

La prise femelle de branchement doit être du type à mise à la
terre (mise à la masse) et respecter la configuration NEMA 5-15P
(15 A, 125 V).

Danemark: La prise mâle

d’alimentation

doit

respecter

la section 107-2 D1 de

la norme DK2 1a ou DK2 5a.

Suisse: La prise mâle d’alimentation doit respecter la norme SEV/ASE

1011.

Europe La prise secteur doit être conforme aux normes CEE 7/7

(“SCHUKO”)
LE cordon secteur doit porter la mention <HAR> ou <BASEC> et

doit être de type HO3VVF3GO.75 (minimum).

– 11 –

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OMPLIANCES AND SAFETY STATEMENTS

Bitte unbedingt vor dem Einbauen des Switches die folgenden
Sicherheitsanweisungen

durchlesen:

WARNUNG:

Die Installation und der Ausbau des Geräts darf nur durch

Fachpersonal erfolgen.

◆

Das Gerät sollte nicht an eine ungeerdete Wechselstromsteckdose

angeschlossen werden.

◆

Das Gerät muß an eine geerdete Steckdose angeschlossen werden, welche

die internationalen Sicherheitsnormen erfüllt.

◆

Der Gerätestecker (der Anschluß an das Gerät, nicht der

Wandsteckdosenstecker) muß einen gemäß EN 60320/IEC 320
konfigurierten Geräteeingang haben.

◆

Die Netzsteckdose muß in der Nähe des Geräts und leicht zugänglich sein.

Die Stromversorgung des Geräts kann nur durch Herausziehen des
Gerätenetzkabels aus der Netzsteckdose unterbrochen werden.

◆

Der Betrieb dieses Geräts erfolgt unter den SELV-Bedingungen

(Sicherheitskleinstspannung)

gemäß IEC 60950. Diese Bedingungen sind
nur gegeben, wenn auch die an das Gerät angeschlossenen Geräte unter
SELV-Bedingungen betrieben werden.

Stromkabel. Dies muss von dem Land, in dem es benutzt wird geprüft werden:

Schweiz Dieser Stromstecker muß die SEV/ASE 1011Bestimmungen einhalten.

Europe Das Netzkabel muß vom Typ HO3VVF3GO.75 (Mindestanforderung)

sein und die Aufschrift <HAR> oder <BASEC> tragen.
Der Netzstecker muß die Norm CEE 7/7 erfüllen (”SCHUKO”).

– 12 –

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OMPLIANCES AND SAFETY STATEMENTS

WARNINGS AND CAUTIONARY MESSAGES

W

ARNING

:

This product does not contain any serviceable user parts.

W

ARNING

:

Installation and removal of the unit must be carried out by

qualified personnel only.

W

ARNING

:

When connecting this device to a power outlet, connect the
field ground lead on the tri-pole power plug to a valid earth ground line
to prevent electrical hazards.

W

ARNING

:

This switch uses lasers to transmit signals over fiber optic
cable. The lasers are compliant with the requirements of a Class 1
Laser Product and are inherently eye safe in normal operation.
However, you should never look directly at a transmit port when it is
powered on.

C

AUTION

:

Wear an anti-static wrist strap or take other suitable
measures to prevent electrostatic discharge when handling this
equipment.

C

AUTION

:

Do not plug a phone jack connector in the RJ-45 port. This
may damage this device.

C

AUTION

:

Use only twisted-pair cables with RJ-45 connectors that
conform to FCC standards.

ENVIRONMENTAL STATEMENTS

The manufacturer of this product endeavours to sustain an environmentally­friendly policy throughout the entire production process. This is achieved though
the following means:

◆

Adherence to national legislation and regulations on environmental

production standards.

◆

Conservation of operational resources.

◆

Waste reduction and safe disposal of all harmful un-recyclable by-products.

◆

Recycling of all reusable waste content.

◆

Design of products to maximize recyclables at the end of the product’s life

span.

◆

Continual monitoring of safety standards.

– 13 –

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OMPLIANCES AND SAFETY STATEMENTS

END OF PRODUCT LIFE S

PAN

This product is manufactured in such a way as to allow for the recovery and
disposal of all included electrical components once the product has reached the
end of its life.

MANUFACTURING M

ATERIALS

There are no hazardous nor ozone-depleting materials in this product.

D

OCUMENTATION

All printed documentation for this product uses biodegradable paper that
originates from sustained and managed forests. The inks used in the printing
process are non-toxic.

– 14 –

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OMPLIANCES AND SAFETY STATEMENTS

– 15 –

ABOUT THIS G

UIDE

PURPOSE

This guide details the hardware features of the switch, including the physical and
performance-related characteristics, and how to install the switch.

AUDIENCE

The guide is intended for use by network administrators who are responsible for
installing and setting up network equipment; consequently, it assumes a basic
working knowledge of LANs (Local Area Networks).

CONVENTIONS

The following conventions are used throughout this guide to show information:

NOTE:

Emphasizes important information or calls your attention to

related features or instructions.

C

AUTION

:

Alerts you to a potential hazard that could cause loss of data,
or damage the system or equipment.

W

ARNING

:

Alerts you to a potential hazard that could cause personal

injury.

RELATED PUBLICATIONS

The following publication gives specific information on how to operate and use
the management functions of the switch:

The Management Guide

Also, as part of the switch’s software, there is an online web-based help that
describes all management related features.

– 16 –

ABOUT THIS

G

UIDE

REVISION HISTORY

This section summarizes the changes in each revision of this guide.

MAY 2010 R

EVISION

This is the first revision of this guide.

– 17 –

C

ONTENTS

COMPLIANCES AND SAFETY STATEMENTS 5
ABOUT THIS GUIDE 15
CONTENTS 17
TABLES 19
FIGURES 21

1 INTRODUCTION 23

Overview 23
Description of Hardware 25
Features and Benefits 30

2 NETWORK PLANNING 33

Introduction to Switching 33
Application Examples 34
Application Notes 39

3 INSTALLING THE SWITCH 41

Selecting a Site 41
Ethernet Cabling 42
Equipment Checklist 43
Mounting 44
Installing an Optional Module into the Switch 47
Installing an Optional SFP Transceiver 48
Connecting Switches in a Stack 49
Connecting to a Power Source 51
Connecting to the Console Port 52

– 18 –

C

ONTENTS

4 MAKING NETWORK CONNECTIONS 55

Connecting Network Devices 55
Twisted-Pair Devices 55
Fiber Optic SFP Devices 58
10 Gbps Fiber Optic Connections 61
Connectivity Rules 63
Cable Labeling and Connection Records 65

A TROUBLESHOOTING 67

Diagnosing Switch Indicators 67
Power and Cooling Problems 69
Installation 69
In-Band Access 69
Stack Troubleshooting 70

B CABLES 71

Twisted-Pair Cable and Pin Assignments 71
Fiber Standards 75

C SPECIFICATIONS 77

Physical Characteristics 77
Switch Features 79
Management Features 80
Standards 80
Compliances 81
10GBASE Extender Module (XFP) 81

GLOSSARY 83
INDEX 89

– 19 –

T

ABLES

Table 1: Port Status LEDs 26
Table 2: System Status LEDs 27
Table 3: Supported XFP Transceivers 29
Table 4: Module LEDs 29
Table 5: Serial Cable Wiring 52
Table 6: Maximum 1000BASE-SX Gigabit Ethernet Cable Lengths 63
Table 7: Maximum 10GBASE-LR 10 Gigabit Ethernet Cable Length 63
Table 8: Maximum 10GBASE-ER 10 Gigabit Ethernet Cable Length 64
Table 9: Maximum 1000BASE-T Gigabit Ethernet Cable Length 64
Table 10: Maximum 1000BASE-SX Gigabit Ethernet Cable Lengths 64
Table 11: Maximum 1000BASE-LX Gigabit Ethernet Cable Length 64
Table 12: Maximum 1000BASE-LH Gigabit Ethernet Cable Length 64
Table 13: Maximum Fast Ethernet Cable Lengths 65
Table 14: Maximum Ethernet Cable Length 65
Table 15: Troubleshooting Chart 67
Table 16: Power/RPS LEDs 68
Table 17: 10/100BASE-TX MDI and MDI-X Port Pinouts 72
Table 18: 1000BASE-T MDI and MDI-X Port Pinouts 74
Table 19: Fiber Standards 75

– 20 –

T

ABLES

– 21 –

F

IGURES

Figure 1:

Front Panels 24

Figure 2:

Rear Panel 24

Figure 3:

Port LEDs 26

Figure 4:

System LEDs 27

Figure 5:

Power Supply Sockets

28

Figure 6:

Single-Port 10GBASE Module (XFP)

29

Figure 7:

Collapsed Backbone

34

Figure 8:

Network Aggregation Plan

35

Figure 9:

Remote Connections with Fiber Cable

36

Figure 10:

Making VLAN Connections

37

Figure 11:

IP Routing for Unicast Traffi

38

Figure 12:

RJ-45 Connections

42

Figure 13:

Attaching the Brackets

45

Figure 14:

Installing the Switch in a Rack

45

Figure 15:

Attaching the Adhesive Feet

46

Figure 16:

Installing an Optional Module

47

Figure 17:

Inserting an SFP Transceiver into a Slot

48

Figure 18:

Making Stacking Connections

50

Figure 19:

Power Socket 51

Figure 20:

Serial Port (RJ-45) Pin-Out

52

Figure 21:

Making Twisted-Pair Connections

56

Figure 22:

Network Wiring Connections

58

Figure 23:

Making Fiber Port Connections

59

Figure 24:

Connecting to an XFP Transceiver

62

Figure 25:

RJ-45 Connector Pin Numbers

71

Figure 26:

Straight-through Wiring

73

Figure 27:

Crossover Wiring

73

– 22 –

F

IGURES

– 23 –

1 I

NTRODUCTION

O

VERVIEW

The LGS103AE and LGS104AE Switches are intelligent multilayer switches (Layer
2, 3) with 24/48 10/100/1000BASE-T ports, four of which are combination
ports1 that are shared with four SFP transceiver slots (see Figure 1, Ports 21-
24/45-48). The rear panel provides two slots for single-port 10 Gigabit Ethernet
hot-swappable expansion modules, and two stacking ports. Units can be stacked
up to eight high through the built-in stacking ports that provide a 48
Gbps stack backplane.

The switches include an SNMP-based management agent embedded on the main
board, which supports both in-band and out-of-band access for managing the
stack.

These switches can easily tame your network with full support for Spanning Tree
Protocol, Multicast Switching, Virtual LANs, and IP routing. It brings order to
poorly performing networks by segregating them into separate broadcast
domains with IEEE 802.1Q compliant VLANs, empowers multimedia applications
with multicast switching and CoS services, and eliminates conventional router
bottlenecks.

These switches can be used to augment or completely replace slow legacy
routers, off-loading local IP traffic to release valuable resources for non-IP
routing or WAN access. With wire-speed performance for Layer 2 and Layer 3,
these switches can significantly improve the throughput between IP segments or
VLANs.

1. If an SFP transceiver is plugged in, the corresponding RJ-45 port is disabled for
ports 21-24 on LGS103AE or ports 45-48 on LGS104AE.

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C

HAPTER

1 | Introduction

Overview

Figure 1: Front Panels

LGS104AE

Port Status LEDs

Stack ID

Serial Console Port

LGS103AE

10/100/1000 Mbps RJ-45 Ports System Status LEDs

SFP Slots

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

21 22 23 24

Stack ID Master

Select

Console

Figure 2: Rear Panel

Power Socket

Redundant Power Socket Module Slots

Stacking Ports

SWITCH

A

RCHITECTURE

These Gigabit Ethernet switches employ a wire-speed, non-blocking switching
fabric. This permits simultaneous wire-speed transport of multiple packets at low
latency on all ports. The switches also feature full-duplex capability on all ports,
which effectively doubles the bandwidth of each connection.

For communications between different VLANs, these switches use IP routing. For
communications within the same VLAN, they use store-and-forward switching to
ensure maximum data integrity. With store-and-forward switching, the entire
packet must be received into a buffer and checked for validity before being
forwarded. This prevents errors from being propagated throughout the network.

These switches include built-in stacking ports that enable up to eight units to be
connected together through a 48 Gbps stack backplane. The switch stack can be
managed from a master unit using a single IP address.

These switches also include two slots on the rear panel for slide-in single-port
10GBASE modules with XFP transceivers.

– 25 –

C

HAPTER

1 |

Introduction

Description of

Hardware

NETWORK MANAGEMENT

O

PTIONS

These switches contain a comprehensive array of LEDs for “at-a-glance”
monitoring of network and port status. They also include a management agent
that allows you to configure or monitor the switch using its embedded
management software, or via SNMP applications. To manage each switch, you
can make a direct connection to the console port (out-of-band), or you can
manage the switches through a network connection (in-band) using Telnet, the
on-board web agent, or SNMP-based network management software.

For a detailed description of the management features, refer to the Management
Guide.

DESCRIPTION OF

H

ARDWARE

10/100/1000BASE-T

P

ORTS

The switches contain 24/48 RJ-45 ports that operate at 10 Mbps or 100 Mbps,
half or full duplex, or at 1000 Mbps, full duplex. Because all ports on these
switches support automatic MDI/MDI-X operation, you can use straight-through
cables for all network connections to PCs or servers, or to other switches or
hubs. (See “1000BASE-T Pin Assignments” on page 74.)

Each of these ports support auto-negotiation, so the optimum transmission
mode (half or full duplex), and data rate (10, 100, or 1000 Mbps) can be
selected automatically. If a device connected to one of these ports does not
support auto-negotiation, the communication mode of that port can be
configured manually.

SFP TRANSCEIVER

S

LOTS

The Small Form Factor Pluggable (SFP) transceiver slots are shared with four of
the RJ-45 ports (ports 21~24 for the LGS103AE and ports 45~48 for the
LGS104AE). In its default configuration, if an SFP transceiver (purchased
separately) is installed in a slot and has a valid link on its port, the associated
RJ-45 port is disabled and cannot be used. The switch can also be configured to
force the use of an RJ-45 port or SFP slot, as required.

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HAPTER

1 | Introduction

Description of Hardware

10 GIGABIT ETHERNET MODULE

S

LOTS

These switches include two slots on the rear panel for hot-swappable single-port
10GBASE modules with XFP transceivers. Refer to “Optional Media Extender

Modules” on page 29 for more information on this module and the supported

10G transceivers.

STACKING

P

ORTS

Each unit includes two stacking ports that provide a 48 Gbps high-speed serial
stack backplane connection. Up to eight 24-port or 48-port switches can be
connected together using optional stacking cables. Note that the 24-port and
48-port switches can be mixed in the same stack. The Stack Master button
enables one switch in the stack to be selected as the Master unit for managing
the entire stack.

PORT AND SYSTEM STATUS LEDS

These switches include a display panel for key system and port indications that
simplify installation and network troubleshooting. The LEDs, which are located
on the front panel for easy viewing, are shown below and described in the
following tables.

Figure 3: Port LEDs

Port Status LEDs

1 2 3 4 5 6 7 8 9 10 11 12 13 14 1

Table 1: Port Status LEDs

LED Condition Status

Link/
Activity/Speed

On/Flashing Amber Port has a valid link at 10 or 100 Mbps. Flashing

indicates activity.

On/Flashing Green Port has a valid link at 1000 Mbps. Flashing

indicates activity.

Off The link is down.

– 27 –

C

HAPTER

1 |

Introduction

Description of

Hardware

Figure 4: System LEDs

System Status LEDs

Stack

24

Stack

Master Power

Link

RPS

Stack ID

Master
Select

Console

Module Diag

Table 2: System Status LEDs

LED

Condition

Status

Power

Green

Internal power is operating normally.

Amber

Internal power supply failure.

Off

Power off or failure.

Diag

Flashing Green

System self-diagnostic test in progress.

Green

System self-diagnostic test successfully
completed.

Amber

System self-diagnostic test has detected a fault.

RPS

Green

Redundant power supply is receiving power.

Amber

Fault in redundant power supply, including
thermal or fan failure.

Off

Redundant power supply is off or not plugged in.

Stack Master

Green

Switch is the Master unit of the stack. State may
include topology discovery, IP assignment, or
normal operations.

Flashing Green

Switch is the Master unit of the stack, system is
initializing.

Amber

Switch is operating as a Slave unit in the stack.

Flashing Amber

System in Master arbitration/election state.

Off

System in standalone mode.

– 28 –

C

HAPTER

1 | Introduction

Description of Hardware

Table 2: System Status LEDs (Continued)

LED

Condition

Status

Stack Link

Green

Uplink and downlink operating normally.

Flashing Green

Uplink has failed.

Flashing Amber

Downlink has failed.

Off

No stacking link present.

Module

Green

An expansion module is installed and operating
normally.

Amber

An expansion module is installed but has failed.

Off

There is no module installed.

Stack ID

1-8

Indicates the switch stack ID.

The Master unit is numbered 1. (Note that If the
master unit fails and a backup unit takes over, the
stack IDs do not change.)

Slave units are numbered 2-8.

Off

In standalone mode.

OPTIONAL REDUNDANT POWER

S

UPPLY

The switch supports an optional Redundant Power Supply (RPS), that can supply
power to the switch in the event the internal power supply fails.

POWER SUPPLY

S

OCKET

There are two power sockets on the rear panel of each switch. The standard
power socket is for the AC power cord. The socket labeled “RPS” is for the
optional Redundant Power Supply (RPS).

Figure 5: Power Supply Sockets

Power Socket

Redundant Power Socket

– 29 –

C

HAPTER

1 |

Introduction

Description of

Hardware

OPTIONAL MEDIA EXTENDER

M

ODULES

10GBASE XFP MODULE

Figure 6: Single-Port 10GBASE Module (XFP)

The module’s XFP slot supports standard 10 Gigabit Ethernet (10G) XFP
transceivers. The 10GBASE transceivers operate at 10 Gbps full duplex with
support for flow control.

Table 3: Supported XFP Transceivers

Media Standard

Vendor

Part Number

Maximum Distance

1GBASE-SR

1GBASE-LR

Black Box

Black Box

LSX080-M0

LSX080-S1

300 m

10 km

EXTENDER MODULE LEDS

The optional 10GBASE slide-in module includes its own integrated LED indicators
on the module’s front panel. The following table describes the LEDs.

Table 4: Module LEDs

LED

Condition

Status

Link/Activity

On/Flashing Green

Port has a valid link at 10 Gbps. Flashing indicates
activity.

Off

The link is down.

– 30 –

C

HAPTER

1 | Introduction

Features and Benefits

FEATURES AND

B

ENEFITS

C

ONNECTIVITY

◆

24 or 48 10/100/1000 Mbps ports for easy Gigabit Ethernet integration and

for protection of your investment in legacy LAN equipment.

◆

Auto-negotiation enables each RJ-45 port to automatically select the

optimum communication mode (half or full duplex) if this feature is
supported by the attached device; otherwise the port can be configured
manually.

◆

RJ-45 10/100/1000BASE-T ports support auto MDI/MDI-X pinout selection.

◆

Unshielded (UTP) cable supported on all RJ-45 ports: Category 3 or better

for 10 Mbps connections, Category 5 or better for 100 Mbps connections,
and Category Category 5, 5e, 6 or better for 1000 Mbps connections.

◆

IEEE 802.3-2005 Ethernet, Fast Ethernet, Gigabit Ethernet, and IEEE

802.3ae 10 Gigabit Ethernet compliance ensures compatibility with
standards-based hubs, network cards and switches from any vendor.

◆

Provides stacking capability via high-speed serial ports with 48 Gbps

stacking bandwidth. Up to 8 units can be stacked together.

E

XPANDABILITY

◆

Supports 1000BASE-SX, 1000BASE-LX, and 1000BASE-LH SFP transceivers.

◆

Optional 10GBASE single-port expansion module with an XFP transceiver

slot.

P

ERFORMANCE

◆

Transparent bridging.

◆

Aggregate duplex bandwidth of up to 88 Gbps for the LGS103AE or 136

Gbps for the LGS104AE.

– 31 –

C

HAPTER

1 |

Introduction

Features and

Benefits

◆

Switching table with a total of 16K MAC address entries and 8K IPv4

address entries or 4K IPv6 address entries

◆

Provides store-and-forward switching for intra-VLAN traffic, and IP routing

for inter-VLAN traffic.

◆

Supports wire-speed switching at layer 2, and wire-speed routing at layer 3.

◆

Broadcast storm control.

M

ANAGEMENT

◆

“At-a-glance” LEDs for easy troubleshooting

◆

Network management agent:

◆

Manages switch (or entire stack) in-band or out-of-band

◆

Supports console, Telnet, SSH, SNMP v1/v2c/v3, RMON (4 groups) and

web-based interface

◆

Slave units provide backup stack management.

– 32 –

C

HAPTER

1 | Introduction

Features and Benefits

– 33 –

2 NETWORK P

LANNING

INTRODUCTION TO

S

WITCHING

A network switch allows simultaneous transmission of multiple packets via non­crossbar switching. This means that it can partition a network more efficiently
than bridges or routers. These switches have, therefore, been recognized as one
of the most important building blocks for today’s networking technology.

When performance bottlenecks are caused by congestion at the network access
point (such as the network card for a high-volume file server), the device
experiencing congestion (server, power user or hub) can be attached directly to
a switched port. And, by using full-duplex mode, the bandwidth of the dedicated
segment can be doubled to maximize throughput.

When networks are based on repeater (hub) technology, the distance between
end stations is limited by a maximum hop count. However, a switch turns the
hop count back to zero. So subdividing the network into smaller and more
manageable segments, and linking them to the larger network by means of a
switch, removes this limitation.

A switch can be easily configured in any Ethernet, Fast Ethernet, Gigabit
Ethernet, or 10G Ethernet network to significantly boost bandwidth while using
conventional cabling and network cards.

– 34 –

C

HAPTER

2 | Network Planning

Application Examples

APPLICATION

E

XAMPLES

The Gigabit Ethernet Switches are not only designed to segment your network,
but also to provide a wide range of options in setting up network connections
and linking VLANs or IP subnets. Some typical applications are described below.

COLLAPSED

B

ACKBONE

The Gigabit Ethernet Switches are an excellent choice for mixed Ethernet, Fast
Ethernet, and Gigabit Ethernet installations where significant growth is expected
in the near future. In a basic stand-alone configuration, it can provide direct full­duplex connections for up to 24/48 workstations or servers. You can easily build
on this basic configuration, adding direct full-duplex connections to workstations
or servers. When the time comes for further expansion, just connect to another
hub or switch using one of the Gigabit Ethernet ports built into the front panel, a
Gigabit Ethernet port on a plug-in SFP transceiver, or a 10G transceiver on an
optional module.

In the figure below, the 48-port Gigabit Ethernet Switch is operating as a
collapsed backbone for a small LAN. It is providing dedicated 10 Mbps full­duplex connections to workstations and 100 Mbps full-duplex connections to
power users, and 1 Gbps full-duplex connections to servers.

Figure 7: Collapsed Backbone

...

...

...

Servers

1

Gbps

Full

Duplex

W

orkstations

100

Mbps

Full

Duplex

W

orkstations

10

Mbps

Full

Duplex

– 35 –

C

HAPTER

2 | Network

Planning

Application

Examples

NETWORK AGGREGATION

P

LAN

With 24 or 48 parallel bridging ports (i.e., 24 or 48 distinct collision domains), a
Gigabit switch stack can collapse a complex network down into a single efficient
bridged node, increasing overall bandwidth and throughput.

In the figure below, the 10/100/1000BASE-T ports in a stack of 48-port Gigabit
Ethernet switches are providing 1000 Mbps connectivity through stackable
switches. In addition, the switches are also connecting several servers at 10
Gbps.

Figure 8: Network Aggregation Plan

Server

Farm

10/100/1000 Mbps

Segments

...

...

– 36 –

C

HAPTER

2 | Network Planning

Application Examples

REMOTE CONNECTIONS WITH FIBER

C

ABLE

Fiber optic technology allows for longer cabling than any other media type. A
1000BASE-SX (MMF) link can connect to a site up to 550 meters away, a
1000BASE-LX (SMF) link up to 5 km, and a 1000BASE-LH link up to 70 km. This
allows a switch stack to serve as a collapsed backbone, providing direct
connectivity for a widespread LAN.

A 1000BASE-SX SFP transceiver can be used for a high-speed connection
between floors in the same building and a 10GBASE-LR module can be used for
high-bandwidth core connections between buildings in a campus setting. For
long-haul connections, a 1000BASE-LH SFP transceiver can be used to reach
another site up to 70 kilometers away.

The figure below illustrates three Gigabit Ethernet switch stacks interconnecting
multiple segments with fiber cable.

Figure 9: Remote Connections with Fiber Cable

Headquarters

W

arehouse

1000BASE-LX SMF
(5

kilometers)

Server

Farm

Remote

Switch

1000BASE-SX

MMF

(500

meters)

Remote

Switch

1000BASE-LX

SMF

(5

kilometers)

...

10/100/1000 Mbps

Segments

... ...

Research & Development

...

– 37 –

C

HAPTER

2 | Network

Planning

Application

Examples

MAKING VLAN

C

ONNECTIONS

These switches support VLANs which can be used to organize any group of
network nodes into separate broadcast domains. VLANs confine broadcast traffic
to the originating group, and can eliminate broadcast storms in large networks.
This provides a more secure and cleaner network environment.

VLANs can be based on untagged port groups, or traffic can be explicitly tagged
to identify the VLAN group to which it belongs. Untagged VLANs can be used for
small networks attached to a single switch. However, tagged VLANs should be
used for larger networks, and all the VLANs assigned to the inter-switch links.

These switches also support multiple spanning trees which allow VLAN groups to
maintain a more stable path between all VLAN members. This can reduce the
overall amount of protocol traffic crossing the network, and provide a shorter
reconfiguration time if any link in the spanning tree fails.

At Layer 3, VLANs are used to create an IP interface, where one or more ports
are assigned to the same IP segment. Traffic is automatically routed between
different IP segments on the same switch, without any need to configure routing
protocols.

Figure 10: Making VLAN Connections

R&D

VLAN 2

VLAN 1

Tagged

Ports

Finance

Untagged Ports

VLAN

unaware

switch

Tagged Port

VLAN
aware
switch

Testing

R&D

Marketing

Finance

T

esting

VLAN 3

VLAN 4

VLAN 3

VLAN 1

VLAN 2

NOTE: When connecting to a switch that does not support IEEE

802.1Q VLAN tags, use untagged ports.

– 38 –

C

HAPTER

2 | Network Planning

Application Examples

USING LAYER 3

R

OUTING

VLANs can significantly enhance network performance and security. However, if
you use conventional routers to interconnect VLANs, you can lose most of your
performance advantage. These Gigabit Ethernet Switches are routing switches
that provide wire-speed routing, which allows you to eliminate your conventional
IP routers, except for a router to handle non-IP protocols and a gateway router
linked to the WAN. Just assign an IP address to any VLANs that need to
communicate. The switches will continue to segregate Layer 2 traffic based on
VLANs, but will now provide inter-VLAN connections for IP applications. The
switches will perform IP routing for specified VLAN groups, a directly connected
subnetwork, a remote IP subnetwork or host address, a subnetwork broadcast
address, or an IP multicast address.

Figure 11: IP Routing for Unicast Traffi

R&D

Testing

IP Network 1

IP Network 2

VLAN 1

VLAN 2

– 39 –

C

HAPTER

2 | Network

Planning

Application

Notes

APPLICATION

N

OTES

1. Full-duplex operation only applies to point-to-point access (such as when a

switch is attached to a workstation, server or another switch). When the
switch is connected to a hub, both devices must operate in half-duplex
mode.

2. For network applications that require routing between dissimilar network

types, you can attach these switches directly to a multi-protocol router.
However, if you have to interconnect distinct VLANs or IP subnets, you can
take advantage of the wire-speed Layer 3 routing provided by these
switches.

3. As a general rule, the length of fiber optic cable for a single switched link

should not exceed:

■

1000BASE-SX: 550 m (1805 ft) for multimode fiber

■

1000BASE-LX: 5 km (3.1 miles) for single-mode fiber

■

1000BASE-LH: 70 km (43.5 miles) for single-mode fiber

■

10GBASE-SR: 300 m (984 ft) for multimode fiber

■

10GBASE-LR: 10 km (6.2 miles) for single-mode fiber

■

10GBASE-ER: 40 km (24.8 miles) for single-mode fiber

However, power budget constraints must also be considered when
calculating the maximum cable length for your specific environment.

– 40 –

C

HAPTER

2 | Network Planning

Application Notes

– 41 –

3 INSTALLING THE S

WITCH

SELECTING A

S

ITE

Switch units can be mounted in a standard 19-inch equipment rack or on a flat
surface. Be sure to follow the guidelines below when choosing a location.

◆

Th

■

be at the center of all the devices you want to link and near a power

outlet.

■

be able to maintain its temperature within 0 to 50 °C (32 to 122 °F)
and its humidity within 5% to 95%, non-condensing

■

provide adequate space (approximately five centimeters or two inches)
on all sides for proper air flow

■

be accessible for installing, cabling and maintaining the devices

■

allow the status LEDs to be clearly visible

◆

Make sure twisted-pair cable is always routed away from power lines,

fluorescent lighting fixtures and other sources of electrical interference,
such as radios and transmitters.

◆

Make sure that the unit is connected to a separate grounded power outlet

that provides 100 to 240 VAC, 50 to 60 Hz, is within 2 m (6.6 feet) of each
device and is powered from an independent circuit breaker. As with any
equipment, using a filter or surge suppressor is recommended.

– 42 –

C

HAPTER

3 | Installing the Switch

Ethernet Cabling

ETHERNET

C

ABLING

To ensure proper operation when installing the switches into a network, make
sure that the current cables are suitable for 10BASE-T, 100BASE-TX or
1000BASE-T operation. Check the following criteria against the current
installation of your network:

◆

Cable type: Unshielded twisted pair (UTP) or shielded twisted pair (STP)

cables with RJ-45 connectors; Category 3 or better for 10BASE-T, Category
5 or better for 100BASE-TX, and Category 5, 5e or 6 for 1000BASE-T.

◆

Protection from radio frequency interference emissions

◆

Electrical surge suppression

◆

Separation of electrical wires (switch related or other) and electromagnetic

fields from data based network wiring

◆

Safe connections with no damaged cables, connectors or shields

Figure 12: RJ-45 Connections

RJ-45 Connector

– 43 –

C

HAPTER

3 | Installing the

Switch

Equipment

Checklist

EQUIPMENT

C

HECKLIST

After unpacking this switch, check the contents to be sure you have received all
the components. Then, before beginning the installation, be sure you have all
other necessary installation equipment.

PACKAGE

C

ONTENTS

◆

24- or 48-port Gigabit Ethernet Switch (LGS103AE or LGS104AE)

◆

Four adhesive foot pads

◆

Bracket Mounting Kit containing two brackets and eight screws for attaching

the brackets to the switch

◆

Power cord—either US, Continental Europe or UK

◆

Console cable (RJ-45 to RS-232)

◆

This Installation Guide

◆

Management Guide CD

OPTIONAL RACK-MOUNTING

E

QUIPMENT

If you plan to rack-mount the switch, be sure to have the following equipment
available:

◆

Four mounting screws for each device you plan to install in a rack—these

are not included

◆

A screwdriver (Phillips or flathead, depending on the type of screws used)

– 44 –

C

HAPTER

3 | Installing the Switch

Mounting

M

OUNTING

The switch can be mounted in a standard 19-inch equipment rack or on a
desktop or shelf. Mounting instructions for each type of site follow.

RACK

M

OUNTING

Before rack mounting the switch, pay particular attention to the following
factors:

◆

Temperature: Since the temperature within a rack assembly may be higher

than the ambient room temperature, check that the rack-environment
temperature is within the specified operating temperature range. (See

page 78.)

◆

Mechanical Loading: Do not place any equipment on top of a rack-mounted

unit.

◆

Circuit Overloading: Be sure that the supply circuit to the rack assembly is

not overloaded.

◆

Grounding: Rack-mounted equipment should be properly grounded.

Particular attention should be given to supply connections other than direct
connections to the mains.

To rack-mount devices:

1. Attach the brackets to the device using the screws provided in the Bracket

Mounting Kit.

– 45 –

C

HAPTER

3 | Installing the

Switch

Mounting

Figure 13: Attaching the Brackets

2. Mount the device in the rack, using four rack-mounting screws (not

provided).

Figure 14: Installing the Switch in a Rack

– 46 –

C

HAPTER

3 | Installing the Switch

Mounting

3. If installing a single switch only, turn to “Connecting to a Power Source”

on page 51.

4. If installing multiple switches, mount them in the rack, one below the other,

in any order.

5. If also installing an RPS, mount it in the rack below the other devices.

DESKTOP OR SHELF

M

OUNTING

1. Attach the four adhesive feet to the bottom of the first switch.

Figure 15: Attaching the Adhesive Feet

2. Set the device on a flat surface near an AC power source, making sure there

are at least two inches of space on all sides for proper air flow.

3. If installing a single switch only, go to “Connecting to a Power Source” on

page 51.

4. If installing multiple switches, attach four adhesive feet to each one. Place

each device squarely on top of the one below, in any order.

5. If also installing an RPS, place it close to the stack.

– 47 –

C

HAPTER

3 | Installing the Switch

Installing an Optional Module into the Switch

INSTALLING AN OPTIONAL MODULE INTO THE

S

WITCH

Figure 16: Installing an Optional Module

NOTE: The slide-in modules are hot-swappable, you do not need to

power off the switch before installing or removing a module.

To install an optional module into the switch, do the following:

1. Remove the blank metal plate (or a previously installed module) from the

appropriate slot by removing the two screws with a flat-head screwdriver.

2. Before opening the package that contains the module, touch the bag to the

switch casing to discharge any potential static electricity. Also, it is
recommended to use an ESD wrist strap during installation.

3. Remove the module from the anti-static shielded bag.

4. Holding the module level, guide it into the carrier rails on each side and

gently push it all the way into the slot, ensuring that it firmly engages with
the connector.

5. If you are sure the module is properly mated with the connector, tighten the

retainer screws to secure the module in the slot.

6. The Module LED on the switch’s front panel should turn green to confirm

that the module is correctly installed and ready to use.

– 48 –

C

HAPTER

3 | Installing the Switch

Installing an Optional SFP Transceiver

INSTALLING AN OPTIONAL SFP

T

RANSCEIVER

Figure 17: Inserting an SFP Transceiver into a Slot

These switches support 1000BASE-SX and 1000BASE-LX, and 1000BASE-LH
SFP-compatible transceivers. To install an SFP transceiver, do the following:

1. Consider network and cabling requirements to select an appropriate SFP

transceiver type.

2. Insert the transceiver with the optical connector facing outward and the slot

connector facing down. Note that SFP transceivers are keyed so they can
only be installed in one orientation.

3. Slide the SFP transceiver into the slot until it clicks into place.

NOTE: SFP transceivers are hot-swappable. The switch does not need

to be powered off before installing or removing a transceiver. However,
always first disconnect the network cable before removing

a

transceiver.

NOTE: SFP transceivers are not provided in the switch package.

– 49 –

C

HAPTER

3 | Installing the Switch

Connecting Switches in a Stack

CONNECTING SWITCHES IN A

S

TACK

Figure 18 shows how the stack cables are connected between switches in a

stack. Each stacking connection is a 48 Gbps full-duplex high-speed serial link
using proprietary stacking cables. The switch supports a line- and ring-topology
stacking configuration, or can be used stand alone. To ensure minimal disruption
in case a unit or stacking cable fails, we recommend always use a ring-topology.

In line-topology stacking there is a single stack cable connection between each
switch that carries two-way communications across the stack. In ring-topology
stacking, an extra cable is connected between the top and bottom switches
forming a “ring” or “closed-loop.” The closed-loop cable provides a redundant
path for the stack link, so if one link fails, stack communications can still be
maintained. Figure 18 illustrates a ring-topology stacking configuration.

To connect up to eight switches in a stack, perform the following steps:

1. Plug one end of the stack cable (ordered separately) in the Down (right)

port of the top unit.

2. Plug the other end of the stack cable into the Up (left) port of the next unit.

3. Repeat steps 1 and 2 for each unit in the stack. Form a simple chain starting

at the Down port on the top unit and ending at the Up port on the bottom
unit (stacking up to 8 units).

4. (Optional) To form a wrap-around topology, plug one end of a stack cable

into the Down port on the bottom unit and the other end into the Up port on
the top unit.

– 50 –

C

HAPTER

3 | Installing the Switch

Connecting Switches in a Stack

Figure 18: Making Stacking Connections

5. Select the Master unit in the stack by pressing the Master button in on only

one of the switches. Only one switch in the stack can operate as the Master,
all other units operate in slave mode. If more than one switch in the stack is
selected as Master, or if no switches are selected, the system will select the
unit with the lowest MAC address as the Master.

STACKING

T

OPOLOGIES

All units in the stack must be connected via stacking cable. You can connect
units in a simple cascade configuration, connecting Down ports to Up ports, from
the top unit to the bottom unit. Using this “line” topology, if any link or unit in
the stack fails, the stack is split and two separate segments are formed. The
Stack Link LEDs on the units that are disconnected flash to indicate that the
stack link between them is not functioning (see Table 2, “System Status LEDs,”

on page 27).

When using line topology and a stack link failure occurs, the stack reboots and a
Master unit is selected within each of the two stack segments. The Master unit
will be either the unit with the Master button depressed or the unit with the
lowest MAC address if the Master button is not depressed on any unit. When the
stack reboots and resumes operations, note that the IP address will be the same
for both of the stack segments. To resolve the conflicting IP addresses, you

– 51 –

C

HAPTER

3 | Installing the Switch

Connecting to a Power Source

should manually replace the failed link or unit as soon as possible. If you are
using a wrap-around stack topology, a single point of failure in the stack will not
cause the stack to fail. It would take two or more points of failure to break the
stack apart.

If the Master unit fails or is powered off, the backup unit will take control of the
stack without any loss of configuration settings. The Slave unit with the lowest
MAC address is selected as the backup unit.

CONNECTING TO A POWER

S

OURCE

To connect a switch to a power source:

1. Insert the power cable plug directly into the AC socket located at the back of

the switch.

Figure 19: Power Socket

2. Plug the other end of the cable into a grounded, 3-pin, AC power source.

NOTE: For International use, you may need to change the AC line

cord. You must use a line cord set that has been approved for the
socket type in your country.

3. Check the front-panel LEDs as the device is powered on to be sure the PWR

LED is lit. If not, check that the power cable is correctly plugged in.

– 52 –

C

HAPTER

3 | Installing the Switch

Connecting to the Console Port

4. If you have purchased a Redundant Power Supply, connect it to the switch

and to an AC power source now, following the instructions included with the
package.

CONNECTING TO THE CONSOLE

P

ORT

The RJ-45 serial port on the switch’s front panel is used to connect to the switch
for out-of-band console configuration. The on-board configuration program can
be accessed from a terminal or a PC running a terminal emulation program. The
pin assignments used to connect to the serial port are provided in the following
table.

Figure 20: Serial Port (RJ-45) Pin-Out

8

8

1

1

WIRING MAP FOR SERIAL

C

ABLE

Table 5: Serial Cable Wiring

Switch’s 9-Pin
Serial Port

Null Modem PC’s 9-Pin

DTE

Port

6 RXD (receive data) <--------------------- 3 TXD (transmit data)

3 TXD (transmit data) ---------------------> 2 RXD (receive data)

5 SGND (signal ground) ----------------------- 5 SGND (signal ground)

No other pins are used.

The serial port’s configuration requirements are as follows:

◆

Default Baud rate—115,200 bps

– 53 –

C

HAPTER

3 | Installing the Switch

Connecting to the Console Port

◆

Character Size—8 Characters

◆

Parity—None

◆

Stop bit—One

◆

Data bits—8

◆

Flow control—none

– 54 –

C

HAPTER

3 | Installing the Switch

Connecting to the Console Port

– 55 –

4 MAKING NETWORK C

ONNECTIONS

CONNECTING NETWORK

D

EVICES

This switch is designed to interconnect multiple segments (or collision domains).
It can be connected to network cards in PCs and servers, as well as to hubs,
switches or routers. It may also be connected to devices using optional XFP or
SFP transceivers.

TWISTED-PAIR

D

EVICES

Each device requires an unshielded twisted-pair (UTP) cable with RJ-45
connectors at both ends. Use Category 5, 5e or 6 cable for 1000BASE-T
connections, Category 5 or better for 100BASE-TX connections, and Category 3
or better for 10BASE-T connections.

CABLING

G

UIDELINES

The RJ-45 ports on the switch support automatic MDI/MDI-X pinout
configuration, so you can use standard straight-through twisted-pair cables to
connect to any other network device (PCs, servers, switches, routers, or hubs).

See Appendix B for further information on cabling.

C

AUTION: Do not plug a phone jack connector into an RJ-45 port. This

will damage the switch. Use only twisted-pair cables with RJ-45
connectors that conform to FCC standards.

– 56 –

C

HAPTER

4 | Making Network Connections

Twisted-Pair Devices

CONNECTING TO PCS, SERVERS, HUBS AND

S

WITCHES

1. Attach one end of a twisted-pair cable segment to the device’s RJ-45

connector.

Figure 21: Making Twisted-Pair Connections

2. If the device is a network card and the switch is in the wiring closet, attach

the other end of the cable segment to a modular wall outlet that is
connected to the wiring closet. (See the section “Network Wiring

Connections” on page 57.) Otherwise, attach the other end to an available

port on the switch.

Make sure each twisted pair cable does not exceed 100 meters (328 ft) in
length.

NOTE: Avoid using flow control on a port connected to a hub unless it

is actually required to solve a problem. Otherwise back pressure
jamming signals may degrade overall performance for the segment
attached to the hub.

3. As each connection is made, the Link LED (on the switch) corresponding to

each port will light green (1000 Mbps) or yellow (10/100 Mbps) to indicate
that the connection is valid.

– 57 –

C

HAPTER

4 | Making Network

Connections

Twisted-Pair

Devices

NETWORK WIRING

C

ONNECTIONS

Today, the punch-down block is an integral part of many of the newer equipment
racks. It is actually part of the patch panel. Instructions for making connections
in the wiring closet with this type of equipment follows.

1. Attach one end of a patch cable to an available port on the switch, and the

other end to the patch panel.

2. If not already in place, attach one end of a cable segment to the back of the

patch panel where the punch-down block is located, and the other end to a
modular wall outlet.

3. Label the cables to simplify future troubleshooting. See “Cable Labeling and

Connection Records” on page 65.

– 58 –

w it 10 /1 0

6 7 2 4 L

C

HAPTER

4 | Making Network Connections

Fiber Optic SFP Devices

Figure 22: Network Wiring Connections

Equipment

Rack

(side

view)

Network

Switch

Punch-Down

Block

Patch

Panel

Wall

FIBER OPTIC SFP

D

EVICES

An optional Gigabit SFP transceiver (1000BASE-SX, 1000BASE-LX or 1000BASE­LH) can be used for a backbone connection between switches, or for connecting
to a high-speed server.

Each single-mode fiber port requires 9/125 micron single-mode fiber optic cable
with an LC connector at both ends. Each multimode fiber optic port requires 50/
125 or 62.5/125 micron multimode fiber optic cabling with an LC connector at
both ends.

– 59 –

C

HAPTER

4 | Making Network

Connections

Fiber Optic SFP

Devices

W

ARNING: This switch uses lasers to transmit signals over fiber optic

cable. The lasers are compliant with the requirements of a Class 1
Laser Product and are inherently eye safe in normal operation.
However, you should never look directly at a transmit port when it is
powered on.

W

ARNING: When selecting a fiber SFP device, considering safety,

please make sure that it can function at a temperature that is not less
than the recommended maximum operational temperature of the
product. You must also use an approved Laser Class 1 SFP transceiver.

1. Remove and keep the LC port’s rubber plug. When not connected to a fiber

cable, the rubber plug should be replaced to protect the optics.

2. Check that the fiber terminators are clean. You can clean the cable plugs by

wiping them gently with a clean tissue or cotton ball moistened with a little
ethanol. Dirty fiber terminators on fiber optic cables will impair the

quality

of

the light transmitted through the cable and lead to degraded performance

on the port.

3. Connect one end of the cable to the LC port on the switch and the other end

to the LC port on the other device. Since LC connectors are keyed, the cable
can be attached in only one orientation.

Figure 23: Making Fiber Port Connections

4. As a connection is made, check the Link LED on the switch corresponding to

the port to be sure that the connection is valid.

– 60 –

C

HAPTER

4 | Making Network Connections

Fiber Optic SFP Devices

The 1000BASE-SX, 1000BASE-LX, 1000BASE-LH fiber optic ports operate at
1 Gbps, full duplex, with auto-negotiation of flow control. The maximum length
for fiber optic cable operating at Gigabit speed will depend on the fiber type as
listed under “1000 Mbps Gigabit Ethernet Collision Domain” on page 64.

– 61 –

C

HAPTER

4 | Making Network Connections

10 Gbps Fiber Optic Connections

10 GBPS FIBER OPTIC

C

ONNECTIONS

An optional 10 Gigabit transceiver (XFP) can be used for a backbone connection
between switches.

Single-mode fiber ports require 9/125 micron single-mode fiber optic cable.
Multimode fiber optic ports require 50/125 or 62.5/125 micron multimode fiber
optic cable. Each fiber optic cable must have an LC connector attached at both
ends.

W

ARNING: These switches use lasers to transmit signals over fiber

optic cable. The lasers are compliant with the requirements of a Class 1
Laser Product and are inherently eye safe in normal operation.
However, you should never look directly at a transmit port when it is
powered on.

W

ARNING: When selecting a fiber device, considering safety, please

make sure that it can function at a temperature that is not less than the
recommended maximum operational temperature of the product. You
must also use an approved Laser Class 1 SFP transceiver.

1. Remove and keep the port’s protective cover. When not connected to a fiber

cable, the cover should be replaced to protect the optics.

2. Check that the fiber terminators are clean. You can clean the cable plugs by

wiping them gently with a clean tissue or cotton ball moistened with a little
ethanol. Dirty fiber terminators on fiber cables will impair the quality of the
light transmitted through the cable and lead to degraded performance on
the port.

3. Connect one end of the cable to the LC port on the switch and the other end

to the LC port on the other device. Since LC connectors are keyed, the cable
can be attached in only one orientation.

– 62 –

C

HAPTER

4 | Making Network Connections

10 Gbps Fiber Optic Connections

Figure 24: Connecting to an XFP Transceiver

4. As a connection is made, check the Link LED on the module to be sure that

the connection is valid.

The 10G fiber optic ports operate at 10 Gbps full duplex. The maximum length
for fiber optic cable operating at 10 Gbps will depend on the fiber type as listed
under “10 Gbps Ethernet Collision Domain” on page 63.

– 63 –

C

HAPTER

4 | Making Network

Connections

Connectivity

Rules

CONNECTIVITY

R

ULES

When adding hubs (repeaters) to your network, please follow the connectivity
rules listed in the manuals for these products. However, note that because
switches break up the path for connected devices into separate collision
domains, you should not include the switch or connected cabling in your
calculations for cascade length involving other devices.

1000BASE-T CABLE

R

EQUIREMENTS

All Category 5 UTP cables that are used for 100BASE-TX connections should also
work for 1000BASE-T, providing that all four wire pairs are connected. However,
it is recommended that for all critical connections, or any new cable installations,
Category 5e (enhanced Category 5) or Category 6 cable should be used. The
Category 5e specification includes test parameters that are only
recommendations for Category 5. Therefore, the first step in preparing existing
Category 5 cabling for running 1000BASE-T is a simple test of the cable
installation to be sure that it complies with the IEEE 802.3-2005 standards.

10 GBPS ETHERNET COLLISION

D

OMAIN

Table 6: Maximum 1000BASE-SX Gigabit Ethernet Cable Lengths

Fiber Size Fiber Bandwidth Maximum Cable Length Connector

62.5/125 micron
single-mode fiber

160 MHz/km 2-26 m (7-85 ft.) LC

200 MHz/km 2-33 m (7-108 ft.) LC

50/125 micron
single-mode fiber

400 MHz/km 2-66 m (7-216 ft.) LC

500 MHz/km 2-82 m (7-269 ft.) LC

2000 MHz/km 2-300 m (7-984 ft.) LC

Table 7: Maximum 10GBASE-LR 10 Gigabit Ethernet Cable Length

Fiber Size Fiber Bandwidth Maximum Cable Length Connector

9/125 micron single­mode fiber

N/A 10 km (6.2 miles) LC

– 64 –

C

HAPTER

4 | Making Network Connections

Connectivity Rules

Table 8: Maximum 10GBASE-ER 10 Gigabit Ethernet Cable Length

Fiber Size Fiber Bandwidth Maximum Cable Length Connector

9/125 micron single­mode fiber

N/A 40 km (24.85 miles) LC

1000 MBPS GIGABIT ETHERNET COLLISION

D

OMAIN

Table 9: Maximum 1000BASE-T Gigabit Ethernet Cable Length

Cable Type

Maximum Cable Length

Connector

Category 5, 5e, or 6 100-ohm UTP or STP

100 m (328 ft)

RJ-45

Table 10: Maximum 1000BASE-SX Gigabit Ethernet Cable Lengths

Fiber Size Fiber Bandwidth Maximum Cable Length Connector

62.5/125 micron
multimode fiber

160 MHz/km 2-220 m (7-722 ft) LC

200 MHz/km 2-275 m (7-902 ft) LC

50/125 micron
multimode fiber

400 MHz/km 2-500 m (7-1641 ft) LC

500 MHz/km 2-550 m (7-1805 ft) LC

Table 11: Maximum 1000BASE-LX Gigabit Ethernet Cable Length

Fiber Size Fiber Bandwidth Maximum Cable Length Connector

9/125 micron single­mode fiber

N/A 2 m - 5 km (7 ft - 3.2 miles) LC

Table 12: Maximum 1000BASE-LH Gigabit Ethernet Cable Length

Fiber Size Fiber Bandwidth Maximum Cable Length Connector

9/125 micron single­mode fiber

N/A 2 m - 70 km LC

(7 ft - 43.5 miles)

– 65 –

C

HAPTER

4 | Making Network Connections

Cable Labeling and Connection Records

100 MBPS FAST ETHERNET COLLISION

D

OMAIN

Table 13: Maximum Fast Ethernet Cable Lengths

Type Cable Type Max. Cable Length Connector

100BASE-TX

Category 5 or better 100-ohm
UTP or

STP

100 m (328 ft) RJ-45

10 MBPS ETHERNET COLLISION

D

OMAIN

Table 14: Maximum Ethernet Cable Length

Type

Cable Type

Max. Cable Length

Connector

10BASE-T

Category 3 or better 100-ohm UTP

100 m (328 ft)

RJ-45

CABLE LABELING AND CONNECTION

R

ECORDS

When planning a network installation, it is essential to label the opposing ends of
cables and to record where each cable is connected. Doing so will enable you to
easily locate inter-connected devices, isolate faults and change your topology
without need for unnecessary time consumption.

To best manage the physical implementations of your network, follow these
guidelines:

◆

Clearly label the opposing ends of each cable.

◆

Using your building’s floor plans, draw a map of the location of all network-

connected equipment. For each piece of equipment, identify the devices to
which it is connected.

◆

Note the length of each cable and the maximum cable length supported by

the switch ports.

◆

For ease of understanding, use a location-based key when assigning

prefixes to your cable labeling.

◆

Use sequential numbers for cables that originate from the same equipment.

– 66 –

C

HAPTER

4 | Making Network Connections

Cable Labeling and Connection Records

◆

Differentiate between racks by naming accordingly.

◆

Label each separate piece of equipment.

◆

Display a copy of your equipment map, including keys to all abbreviations at

each equipment rack.

– 67 –

A T

ROUBLESHOOTING

DIAGNOSING SWITCH

I

NDICATORS

Table 15: Troubleshooting Chart

Symptom Action

PWR LED is Off

◆

Check connections between the switch, the power cord and

the wall outlet.

◆

Contact your dealer for assistance.

Power LED is Amber

◆

Internal power supply has failed. Contact your local dealer

for assistance.

DIAG LED Flashing
Yellow

Stack Master LED is
Flashing Amber

Stack Link LED is
Flashing Green/Amber

◆

Power cycle the switch to try and clear the condition.

◆

If the condition does not clear, contact your dealer for

assistance.

◆

The stack has not completed its initial configuration. Wait a

few minutes for the process to complete.

◆

Check that all stacking cables are properly connected.

◆

The uplink/downlink has failed.

◆

For the indicated stack link, check that the stacking cables

are properly connected. Replace the stacking cable if
necessary.

◆

Power cycle the switch to try and clear the condition.

Link LED is Off

◆

Verify that the switch and attached device are powered on.

◆

Be sure the cable is plugged into both the switch and

corresponding device.

◆

If the switch is installed in a rack, check the connections to

the punch-down block and patch panel.

◆

Verify that the proper cable type is used and its length does

not exceed specified limits.

◆

Check the adapter on the attached device and cable

connections for possible defects. Replace the defective
adapter or cable if necessary.

– 68 –

C

HAPTER

A | Troubleshooting

Diagnosing Switch Indicators

DIAGNOSING POWER PROBLEMS WITH THE LEDS

The Power and RPU LEDs work in combination to indicate power status as
follows.

Table 16: Power/RPS LEDs

Power LED

RPU LED

Status

Green

Green

Internal power functioning normally; RPU is present.

Green

Amber

Internal power functioning normally; RPU plugged in but faulty.

Green

Off

Internal power functioning normally; RPU not plugged in.

Amber

Green

Internal power faulty; RPU delivering power.

Off

Off

Both internal power and RPU unplugged or not functioning.

– 69 –

C

HAPTER

A |

Troubleshooting

Power and Cooling

Problems

POWER AND COOLING

P

ROBLEMS

If the power indicator does not turn on when the power cord is plugged in, you
may have a problem with the power outlet, power cord, or internal power
supply. However, if the unit powers off after running for a while, check for loose
power connections, power losses or surges at the power outlet. If you still
cannot isolate the problem, the internal power supply may be defective.

I

NSTALLATION

Verify that all system components have been properly installed. If one or more
components appear to be malfunctioning (such as the power cord or network
cabling), test them in an alternate environment where you are sure that all the
other components are functioning properly.

IN-BAND

A

CCESS

You can access the management agent in the switch from anywhere within the
attached network using Telnet, a web browser, or other network management
software tools. However, you must first configure the switch with a valid IP
address, subnet mask, and default gateway. If you have trouble establishing a
link to the management agent, check to see if you have a valid network
connection. Then verify that you entered the correct IP address. Also, be sure
the port through which you are connecting to the switch has not been disabled.
If it has not been disabled, then check the network cabling that runs between
your remote location and the switch.

NOTE: The management agent accepts up to four simultaneous Telnet

sessions. If the maximum number of sessions already exists, an
additional Telnet connection will not be able to log into the system.

– 70 –

C

HAPTER

A | Troubleshooting

Stack Troubleshooting

STACK

T

ROUBLESHOOTING

If a stack fails to initialize or function, first check the following items:

◆

Check that all stacking cables are properly connected.

◆

Check if any stacking cables appear damaged.

◆

Check that only one Stack Master button is pressed in.

◆

Check that all switches in the stack are powered on.

After checking all items, reboot all the switches in the stack.

Switches in the stack may be configured using a ring- or line-topology. To ensure
minimal disruption in case a unit or stacking cable fails, always use a ring­topology. When using ring-topology configuration and a switch fails, or

a
stacking cable is disconnected, the stack continues normal operation using line­topology stacking through the remaining stack connections.

If any changes occur to a slave unit, such as unit failure or insertion of a new
unit, operation of the other units in the stack are not affected. On the other
hand, if the master unit fails, the unit with the lowest MAC address is elected as
the new master. The stack reboots, discovers the new stack topology, assigns
identifiers to each unit, and checks the software images on each unit. This
process make take up to two minutes.

If you do not connect a wrap-around cable from the bottom unit back up to the
top unit in the stack, the failure of a single unit will cause the stack to break into
two separate stacks. In this case, a master unit will be elected for both of the
stacks. However, backup information inherited from the previous master unit will
cause the same IP address to be used by both master units in the two stacks.
You must therefore manually reconfigure the IP address of the management
interface on one of the master units.

– 71 –

B C

ABLES

TWISTED-PAIR CABLE AND PIN

A

SSIGNMENTS

For 10/100BASE-TX connections, the twisted-pair cable must have two pairs of
wires. For 1000BASE-T connections the twisted-pair cable must have four pairs
of wires. Each wire pair is identified by two different colors. For example, one
wire might be green and the other, green with white stripes. Also, an RJ-45
connector must be attached to both ends of the cable.

C

AUTION: DO NOT plug a phone jack connector into any RJ-45 port.

Use only twisted-pair cables with RJ-45 connectors that conform with
FCC standards.

C

AUTION: Each wire pair must be attached to the RJ-45 connectors in

a specific orientation.

The figure below illustrates how the pins on the RJ-45 connector are numbered.
Be sure to hold the connectors in the same orientation when attaching the wires
to the pins.

Figure 25: RJ-45 Connector Pin Numbers

1

8

1

8

– 72 –

C

HAPTER

B | Cables

Twisted-Pair Cable and Pin Assignments

10BASE-T/100BASE-TX PIN

A

SSIGNMENTS

Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for RJ-45
connections: 100-ohm Category 3 or better cable for 10 Mbps connections, or
100-ohm Category 5 or better cable for 100 Mbps connections. Also be sure that
the length of any twisted-pair connection does not exceed 100 meters (328 feet).

The RJ-45 ports on the switch base unit support automatic MDI/MDI-X
operation, so you can use straight-through cables for all network connections to
PCs or servers, or to other switches or hubs. In straight-through cable, pins 1, 2,
3, and 6, at one end of the cable, are connected straight through to pins 1, 2, 3,
and 6 at the other end of the cable. When using any RJ-45 port on this switch,
you can use either straight-through or crossover cable.

Table 17: 10/100BASE-TX MDI and MDI-X Port Pinouts

Pin

MDI Signal Name

MDI-X Signal Name

1

Transmit Data plus (TD+)

Receive Data plus (RD+)

2

Transmit Data minus (TD-)

Receive Data minus (RD-)

3

Receive Data plus (RD+)

Transmit Data plus (TD+)

6

Receive Data minus (RD-)

Transmit Data minus (TD-)

4,5,7,8

Not used

Not used

Note:The “+” and “-” signs represent the polarity of the wires that

make up each wire pair.

STRAIGHT-THROUGH

W

IRING

If the twisted-pair cable is to join two ports and only one of the ports has an
internal crossover (MDI-X), the two pairs of wires must be straight-through.
(When auto-negotiation is enabled for any RJ-45 port on this switch, you can
use either straight-through or crossover cable to connect to any device type.)

You must connect all four wire pairs as shown in the following diagram to
support Gigabit Ethernet.

– 73 –

C

HAPTER

B |

Cables

Twisted-Pair Cable and Pin

Assignments

Figure 26: Straight-through Wiring

EIA/TIA 568B RJ-45 Wiring

Standard

10/100BASE-TX Straight-through

Cable

White/Orange Stripe

Orange

1

End A

2
3
4
5
6
7
8

White/Green Stripe

Blue White/Blue

Stripe Green

White/Brown Stripe

1
2

End

B
3
4
5
6
7
8

Brown

CROSSOVER

W

IRING

If the twisted-pair cable is to join two ports and either both ports are labeled
with an “X” (MDI-X) or neither port is labeled with an “X” (MDI), a crossover
must be implemented in the wiring. (When auto-negotiation is enabled for any
RJ-45 port on this switch, you can use either straight-through or crossover cable
to connect to any device type.)

You must connect all four wire pairs as shown in the following diagram to
support Gigabit Ethernet.

Figure 27: Crossover Wiring

EIA/TIA 568B RJ-45 Wiring

Standard

10/100BASE-TX Crossover

Cable

White/Orange Stripe

Orange

1

End A

2
3
4
5
6
7
8

White/Green Stripe

Blue White/Blue

Stripe Green

White/Brown Stripe

1
2

End

B
3
4
5
6
7
8

Brown

– 74 –

C

HAPTER

B | Cables

Twisted-Pair Cable and Pin Assignments

1000BASE-T PIN

A

SSIGNMENTS

All 1000BASE-T ports support automatic MDI/MDI-X operation, so you can use
straight-through cables for all network connections to PCs or servers, or to other
switches or hubs.

The table below shows the 1000BASE-T MDI and MDI-X port pinouts. These
ports require that all four pairs of wires be connected. Note that for 1000BASE-T
operation, all four pairs of wires are used for both transmit and receive.

Use 100-ohm Category 5, 5e or 6 unshielded twisted-pair (UTP) or shielded
twisted-pair (STP) cable for 1000BASE-T connections. Also be sure that the
length of any twisted-pair connection does not exceed 100 meters (328 feet).

Table 18: 1000BASE-T MDI and MDI-X Port Pinouts

Pin

MDI Signal Name

MDI-X Signal Name

1

Bi-directional Pair A Plus (BI_DA+)

Bi-directional Pair B Plus (BI_DB+)

2

Bi-directional Pair A Minus (BI_DA-)

Bi-directional Pair B Minus (BI_DB-)

3

Bi-directional Pair B Plus (BI_DB+)

Bi-directional Pair A Plus (BI_DA+)

4

Bi-directional Pair C Plus (BI_DC+)

Bi-directional Pair D Plus (BI_DD+)

5

Bi-directional Pair C Minus (BI_DC-)

Bi-directional Pair D Minus (BI_DD-)

6

Bi-directional Pair B Minus (BI_DB-)

Bi-directional Pair A Minus (BI_DA-)

7

Bi-directional Pair D Plus (BI_DD+)

Bi-directional Pair C Plus (BI_DC+)

8

Bi-directional Pair D Minus (BI_DD-)

Bi-directional Pair C Minus (BI_DC-)

CABLE TESTING FOR EXISTING CATEGORY 5 CABLE

Installed Category 5 cabling must pass tests for Attenuation, Near-End Crosstalk
(NEXT), and Far-End Crosstalk (FEXT). This cable testing information is specified
in the ANSI/TIA/EIA-TSB-67 standard. Additionally, cables must also pass test
parameters for Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These
tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, “The Additional
Transmission Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling.”

Note that when testing your cable installation, be sure to include all patch cables
between switches and end devices.

– 75 –

C

HAPTER

B |

Cables

Fiber

Standards

ADJUSTING EXISTING CATEGORY 5 CABLING TO RUN 1000BASE-T

If your existing Category 5 installation does not meet one of the test parameters
for 1000BASE-T, there are basically three measures that can be applied to try
and correct the problem:

1. Replace any Category 5 patch cables with high-performance Category 5e or

Category 6 cables.

2. Reduce the number of connectors used in the link.

3. Reconnect some of the connectors in the link.

FIBER

S

TANDARDS

The International Telecommunication Union (ITU-T) has standardized various
fiber types for data networks. These are summarized in the following table.

Table 19: Fiber Standards

ITU-T
Standard

Description Application

G.651 Multimode Fiber

50/125-micron core

Short-reach connections in the 1300­nm or 850-nm band

G.652

Non-Dispersion-Shifted

Fiber

Single-mode, 9/125-micron core

Longer spans and extended reach.
Optimized for operation in the 1310­nm band. but can also be used in the
1550-nm band

G.652.C Low Water Peak Non-

Dispersion-Shifted Fiber

Single-mode, 9/125-micron core

Longer spans and extended reach.
Optimized for wavelength-division
multiplexing (WDM) transmission
across wavelengths from 1285 to
1625 nm. The zero dispersion
wavelength is in the 1310-nm region.

G.653 Dispersion-Shifted Fiber

Single-mode, 9/125-micron core

Longer spans and extended reach.
Optimized for operation in the region
from 1500 to 1600-nm.

– 76 –

C

HAPTER

B | Cables

Fiber Standards

Table 19: Fiber Standards (Continued)

ITU-T
Standard

Description Application

G.654 1550-nm Loss-Minimized Fiber

Single-mode, 9/125-micron core

Extended long-haul applications.
Optimized for high-power
transmission in the 1500 to 1600-nm
region, with low loss in the 1550-nm
band.

G.655 Non-Zero Dispersion-Shifted

Fiber
Single-mode, 9/125-micron core

Extended long-haul applications.
Optimized for high-power dense
wavelength-division multiplexing
(DWDM) operation in the region from
1500 to 1600-nm.

– 77 –

C S

PECIFICATIONS

PHYSICAL

C

HARACTERISTICS

PORTS

LGS103AE:

20 10/100/1000BASE-T, with auto-negotiation

4 10/100/1000BASE-T shared with 4 SFP transceiver slots
2 10GBASE extender module slots for XFP transceivers
Two slots for stacking transceivers

LGS104AE:44 10/100/1000BASE-T, with auto-negotiation

4 10/100/1000BASE-T shared with 4 SFP transceiver slots
2 10GBASE extender module slots for XFP transceivers
Two slots for stacking transceivers

NETWORK INTERFACE

Ports 1-24/48: RJ-45 connector, auto MDI/MDI-X

10BASE-T: RJ-45 (100-ohm, UTP cable; Category 3 or better)
100BASE-TX: RJ-45 (100-ohm, UTP cable; Category 5 or better)
1000BASE-T: RJ-45 (100-ohm, UTP or STP cable; Category 5, 5e or 6)
*Maximum Cable Length - 100 m (328 ft)

Ports 25-28: RJ-45/SFP shared ports

1000BASE-T: RJ-45 (100-ohm, UTP or STP cable; Category 5, 5e or 6)
*Maximum Cable Length - 100 m (328 ft)
Gigabit fiber transmission: SFP transceiver slots
*The maximum length for fiber optic cable operating at Gigabit speed will
depend on the fiber type as listed under “1000 Mbps Gigabit Ethernet

Collision Domain” on page 64.

BUFFER ARCHITECTURE

LGS103AE: 2 Mbytes
LGS104AE: 2 Mbytes

– 78 –

C

HAPTER

C | Specifications

Physical Characteristics

AGGREGATE BANDWIDTH

LGS103AE: 88 Gbps
LGS104AE: 136 Gbps

SWITCHING DATABASE

16K MAC address entries, 1024 static MAC addresses;
8K IPv4 and 4K IPv6 entries in host table, 4K ARP entries,
12K IPv4 or 6K IPv6 entries in the IP routing table,
64 static IP routes, 32 IP interfaces; 255 multicast groups

LEDS

System: Stack Master, Stack Link, Module, Power, Diag,

RPS

Port: Status (link, speed,

activity)

WEIGHT

LGS103AE: 5.7 kg (12.6 lbs)
LGS104AE: 6.1 kg (13.4 lbs)

SIZE

44.0 x 41.5 x 4.4 cm (17.3 x 16.3 x 1.7 in.)

TEMPERATURE

Operating: 0 to 50 °C (32 to 122 °F)
Storage: -40 to 70 °C (-40 to 158 °F)

HUMIDITY

Operating: 5% to 95% (non-condensing)

AC INPUT

100 to 240 V, 50-60 Hz, 2A

– 79 –

C

HAPTER

C |

Specifications

Switch

Features

POWER SUPPLY

Internal, auto-ranging transformer: 100 to 240 VAC, 47 to 63 Hz
External, supports connection for redundant power supply

POWER CONSUMPTION

LGS103AE: 66 Watts (without expansion modules)

80 Watts (with two expansion modules)

LGS104AE: 100 Watts (without expansion modules)

130 Watts (with two expansion modules)

MAXIMUM CURRENT

LGS103AE: 1 A @ 110 VAC (without expansion modules)

1.1 A @ 110 VAC (with two expansion modules)

0.38 A @ 240 VAC (without expansion modules)

0.44 A @ 240 VAC (with two expansion modules)

LGS104AE: 1.6 A @ 110 VAC (without expansion modules)

1.8 A @ 110 VAC (with two expansion modules)

0.66 A @ 240 VAC (without expansion modules)

0.72 A @ 240 VAC (with two expansion modules)

SWITCH

F

EATURES

FORWARDING MODE

Store-and-forward

THROUGHPUT

Wire speed

FLOW CONTROL

Full-duplex: IEEE 802.3x
Half-duplex: Back pressure

– 80 –

C

HAPTER

C | Specifications

Management Features

MANAGEMENT

F

EATURES

IN-BAND MANAGEMENT

SSH, Telnet, SNMP, or HTTP

OUT-OF-BAND MANAGEMENT

RS-232 DB-9 console port

SOFTWARE LOADING

TFTP in-band, or XModem out-of-band

S

TANDARDS

IEEE 802.3-2005

Ethernet, Fast Ethernet, Gigabit Ethernet

Full-duplex flow control
IEEE 802.3ae 10 Gigabit Ethernet
IEEE 802.1D Spanning Tree Protocol
IEEE 802.1w Rapid Spanning Tree Protocol
IEEE 802.1s Multiple Spanning Tree Protocol
IEEE 802.1Q Virtual LAN
ISO/IEC 8802-3 CSMA/CD

– 81 –

C

HAPTER

C |

Specifications

Compliances

C

OMPLIANCES

CE MARK

EMISSIONS

FCC Class A
Industry Canada Class A
EN55022 (CISPR 22) Class A
EN 61000-3-2/3
VCCI Class A
C-Tick - AS/NZS 3548 (1995) Class A

IMMUNITY

EN 61000-4-2/3/4/5/6/8/11

SAFETY

UL 60950-1 & CSA 60950-1
IEC 60950-1 & EN 60950-1

10GBASE EXTENDER MODULE (XFP)

PORTS

1 slot for 10GBASE XFP transceiver

COMMUNICATION SPEED

10 Gbps

COMMUNICATION MODE

Full duplex

– 82 –

C

HAPTER

C | Specifications

10GBASE Extender Module (XFP)

NETWORK INTERFACE

XFP slot

STANDARDS

IEEE 802.3ae 10 Gigabit Ethernet

– 83 –

G

LOSSARY

10BASE-T

IEEE 802.3 specification for 10 Mbps Ethernet over two pairs of Category 3, 4, or
5 UTP cable.

100BASE-TX

IEEE 802.3u specification for 100 Mbps Ethernet over two pairs of Category 5
UTP cable.

1000BASE-LH

Specification for long-haul Gigabit Ethernet over two strands of 9/125 micron
core fiber cable.

1000BASE-LX

IEEE 802.3z specification for Gigabit Ethernet over two strands of 50/125, 62.5/
125 or 9/125 micron core fiber cable.

1000BASE-SX

IEEE 802.3z specification for Gigabit Ethernet over two strands of 50/125 or

62.5/125 micron core fiber cable.

1000BASE-T

IEEE 802.3ab specification for Gigabit Ethernet over 100-ohm Category 5, 5e or
6 twisted-pair cable (using all four wire pairs).

10GBASE-ER

IEEE 802.3ae specification for 10 Gigabit Ethernet over two strands of 9/125
micron core single-mode fiber cable.

– 84 –

G

LOSSARY

10GBASE-LR

IEEE 802.3ae specification for 10 Gigabit Ethernet over two strands of 9/125
micron core single-mode fiber cable.

10GBASE-SR

IEEE 802.3ae specification for 10 Gigabit Ethernet over two strands of 62.5/125
micron core multimode fiber cable.

10 GIGABIT ETHERNET

A 10 Gbps network communication system based on Ethernet.

AUTO-NEGOTIATION

Signalling method allowing each node to select its optimum operational mode
(e.g., speed and duplex mode) based on the capabilities of the node to which it
is connected.

BANDWIDTH

The difference between the highest and lowest frequencies available for network
signals. Also synonymous with wire speed, the actual speed of the data
transmission along the cable.

COLLISION DOMAIN

Single CSMA/CD LAN segment.

CSMA/CD

CSMA/CD (Carrier Sense Multiple Access/Collision Detect) is the communication
method employed by Ethernet, Fast Ethernet, and Gigabit Ethernet.

END STATION

A workstation, server, or other device that does not forward traffic.

– 85 –

G

LOSSARY

ETHERNET

A network communication system developed and standardized by DEC, Intel,
and Xerox, using baseband transmission, CSMA/CD access, logical bus topology,
and coaxial cable. The successor IEEE 802.3 standard provides for integration
into the OSI model and extends the physical layer and media with repeaters and
implementations that operate on fiber, thin coax and twisted-pair cable.

FAST ETHERNET

A 100 Mbps network communication system based on Ethernet and the CSMA/
CD access method.

FULL-DUPLEX

Transmission method that allows two network devices to transmit and receive
concurrently, effectively doubling the bandwidth of that link.

GIGABIT ETHERNET

A 1000 Mbps network communication system based on Ethernet and the CSMA/
CD access method.

IEEE

Institute of Electrical and Electronic Engineers.

IEEE 802.3

Defines carrier sense multiple access with collision detection (CSMA/CD) access
method and physical layer specifications.

IEEE 802.3AB

Defines CSMA/CD access method and physical layer specifications for
1000BASE-T Gigabit Ethernet. (Now incorporated in IEEE 802.3-2005.)

IEEE 802.3AE

Defines the physical layer specifications for 10 Gigabit Ethernet.

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G

LOSSARY

IEEE 802.3U

Defines CSMA/CD access method and physical layer specifications for 100BASE­TX Fast Ethernet. (Now incorporated in IEEE 802.3-2005.)

IEEE 802.3Z

Defines CSMA/CD access method and physical layer specifications for 1000BASE
Gigabit Ethernet. (Now incorporated in IEEE 802.3-2005.)

LAN SEGMENT

Separate LAN or collision domain.

LED

Light emitting diode used for monitoring a device or network condition.

LOCAL AREA NETWORK (LAN)

A group of interconnected computer and support devices.

MEDIA ACCESS CONTROL (MAC)

A portion of the networking protocol that governs access to the transmission
medium, facilitating the exchange of data between network nodes.

MIB

An acronym for Management Information Base. It is a set of database objects
that contains information about the device.

MODAL BANDWIDTH

Bandwidth for multimode fiber is referred to as modal bandwidth because it
varies with the modal field (or core diameter) of the fiber. Modal bandwidth is
specified in units of MHz per km, which indicates the amount of bandwidth
supported by the fiber for a one km distance.

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G

LOSSARY

NETWORK DIAMETER

Wire distance between two end stations in the same collision domain.

REDUNDANT POWER SUPPLY (RPS)

A backup power supply unit that automatically takes over in case the primary
power supply should fail.

RJ-45 CONNECTOR

A connector for twisted-pair wiring.

SWITCHED PORTS

Ports that are on separate collision domains or LAN segments.

TIA

Telecommunications Industry Association

TRANSMISSION CONTROL PROTOCOL/INTERNET PROTOCOL (TCP/IP)

Protocol suite that includes TCP as the primary transport protocol, and IP as the
network layer protocol.

UTP

Unshielded twisted-pair cable.

VIRTUAL LAN (VLAN)

A Virtual LAN is a collection of network nodes that share the same collision
domain regardless of their physical location or connection point in the

network.

A

VLAN serves as a logical workgroup with no physical barriers, allowing users to

share information and resources as though located on the same LAN.

– 88 –

G

LOSSARY

– 89 –

I

NDEX

NUMERICS

10 Gbps connectivity rules 63
10 Mbps connectivity rules 65
100 Mbps connectivity rules 65
1000 Mbps connectivity rules 64
1000BASE-LH fiber cable Lengths 64
1000BASE-LX fiber cable Lengths 64

1000BASE-SX fiber cable Lengths 63, 64

1000BASE-T

pin assignments 74
100BASE-TX, cable lengths 65
10BASE-T, cable lengths 65

A

adhesive feet, attaching 46
applications

central wiring closet 35

collapsed backbone 34

Layer 3 routing 38

remote connections with fiber 36

VLAN connections 37

B

brackets, attaching 45
buffer size 77

C

cable

Ethernet cable compatibility 42

fiber standards 75

labeling and connection records 65

lengths 63, 65
cleaning fiber terminators 59, 61

compliances

EMC 81

safety 81
connectivity rules

10 Gbps 63

10 Mbps 65

100 Mbps 65

1000 Mbps 64
console port, pin assignments 52
contents of package 43
cooling problems 69
cord sets, international 51

D

desktop mounting 46

E

electrical interference, avoiding 41
equipment checklist 43

Ethernet connectivity rules 63, 65

F

Fast Ethernet connectivity rules 65
features 80

management 31
switch 30

front panel of switch 24

G

Gigabit Ethernet cable lengths 64
grounding for racks 44

I

IEEE 802.3 Ethernet 30
IEEE 802.3ae 10 Gigabit Ethernet 30
IEEE 802.3u Fast Ethernet 30
IEEE 802.3z Gigabit Ethernet 30
indicators, LED 26
installation

connecting devices to the switch 56
desktop or shelf mounting 46
network wiring connections 57

port connections 55, 58

power requirements 41
problems 69
rack mounting 44
site requirements 41

L

laser safety 59, 61
LC port connections 58, 61

– 90 –

I

NDEX

LED indicators

DIAG 27

Module 28

PWR 27

Stack ID 28

Stack Link 28

Stack Master 27
location requirements 41

M

management

agent 25

features 31, 80

SNMP 25
mounting the switch

in a rack 44

on a desktop or shelf 46

N

network

connections 55, 58

examples 34

O

optional modules, installation 47

P

package contents 43
pin assignments 71

1000BASE-T 74

10BASE-T/100BASE-TX 72

console port 52

ports, connecting to 55, 58

power, connecting to 51

R

rack mounting 44
rear panel of switch 24
RJ-45 port

connections 55

pinouts 74
rubber foot pads, attaching 46

S

screws for rack mounting 43
SFP transceiver slots 25
site selelction 41
SNMP agent 25

specifications

compliances 81
environmental 78
power 79

standards

compliance 81

IEEE 80
status LEDs 26
switch architecture 24

T

Telnet 69
temperature within a rack 44
troubleshooting

in-band access 69

power and cooling problems 69
twisted-pair connections 55

V

VLANs

routing 38
VLANS, tagging 37

LGS103AE
LGS104AE